Precise Distance Measurement by a Single Electro-Optic Frequency Comb

We present a precision distance meter that operates from sweeping the repetition rate of an electro-optic (EO) frequency comb. The dynamic range and scan rate of such comb make it possible to measure absolute distances up to hundreds of meters with an accuracy of ±5 μm and an acquisition time of 30 ms. The proposed technique requires no fiber stabilization system, making the device simple and cost-effective.